Clay & Bailey 1228 Series 3 in. x 4 in. Overfill Prevention Valves

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Clay & Bailey
4 in.
15.00 LBS
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Designed for AST’s requiring high GPM flow rate, but only having a 4” NPT opening. The C&B 3X4 has a 3” fill and easily installs in a 4” opening. Flow rate is over 300 gallons per minute at 40 psi. The C&B 3X4 is rated for fuel delivery up to 100 psi and provides positive fuel shut off at high fill rates. Entirely mechanical in operation, the C&B 3X4 can be used in remote fill applications, retrofitted to an existing AST, and has a unique drain back system designed to allow the delivery hose to be emptied after fuel delivery has been stopped. The 3” NPT fill opening allows easy connection to piping or cam fittings. See reverse side for drain back information.


  • Highest Flow Rates Available
  • Positive Shutoff Of Fuel Delivery
  • Accepts Pressure Delivery
  • Can be installed in an AST or UST
  • Easily Retrofitted to Existing Tank
  • No Line Shock at Fuel Delivery Shutdown
  • ULC and UL listed